Richard Hornsby was born in Elsham in Lincolnshire on June 4, 1790. He lived with a farming family, the son of William Hornsby and his wife Sarah.
He started his apprenticeship for Havercroft Wheelwright in Barnetby (North Lincolnshire). He came to Grantham in 1810 looking for work. He approached Richard Seaman, the village blacksmith of Barrowby. When working in Barrowby, he had the idea to put a set of wheels on an adjustable harrow. Seeing this inventiveness, Seaman offered him a partnership in his company. Seaman & Hornsby was started with business partner and blacksmith, Richard Seaman, a fellow methodist. The firm became Richard Hornsby & Sons in 1828, when Seaman retired. The company made ploughs and seed drills. By 1840, the company made steam engines, which were used for traction engines in the 1850s. These were used for harvesting crops.
Five of his children were Richard (born 1827), Louisa, James (born 1836), Helen Mary Anne and William (born 1838).
He died on January 6, 1864. His wife, Mary, died on October 15, 1866, aged 66. At the time of his death he had eight grand children. Two of his great-grand children would go to Eton. Although there is no monument to Richard Hornsby, one of his great-grandsons, Richard William Hornsby, is listed on the war memorial in Barrowby, after being killed in the First World War in Greece. His family were quite wealthy owning 421 acres (1.70 km2) of land, as the Hornsby company was a world leader in engine manufacture, until 1918.
His firm went on to invent the caterpillar track in 1905, which revolutionized land warfare, and built the first working (experimental) diesel engine in 1892.